Triplett AM250 Manuel utilisateur

User Manual

AM250

Thermo-Anemometer + Psychrometer

5 Commonwealth Ave5 Commonwealth Ave

Woburn, MA 01801Woburn, MA 01801

Phone 781-665-1400Phone 781-665-1400

TollToll Free 1-800-517-8431Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Introduction

Congratulations on your purchase of the Triplett AM250 Anemometer/Psychrometer.

The dual display indicates Air Velocity and Humidity, Dew Point, Ambient

Temperature, or Temperature with wind-chill factor. With careful use, this meter will

provide years of reliable service.

Meter Description

1. Vane impeller

2. Temperature sensor

3. Relative Humidity sensor

4. LCD display

5. ON/OFF, HOLD key

6. UNITS, MODE key

7. Battery compartment (on rear)

8. Swivel handle and storage case

9. Lanyard (Neckstrap)

10. Impeller set screw (on rear of meter)

11. Tripod mounting hole

Operation

Turning the meter ON and OFF

Press the ON/OFF/HOLD button to turn the meter ON

Press and hold the ON/OFF/HOLD buttons for approx. 3 seconds to turn it OFF

The meter’s Auto Power OFF feature turns the meter OFF after 20 minutes of inactivity

Change the lower display parameter

With the meter ON, press and hold down the ON/OFF/HOLD button

While continuing to hold the ON/OFF/HOLD button, press the UNITS/MODE button repeatedly to step

through Temperature (oF/oC), Humidity (RH%), Dew Point (TD), & Temperature with wind-chill factor

(WCI). Note that the center display is Air Velocity.

Change the Air Velocity unit of measure

Turn the meter OFF. Press and hold down both buttons until the display turns on and begins

blinking then release both buttons

Press the UNITS/MODE button repeatedly to step through the units (see specs for list) After 5

seconds the meter switches back to normal operation mode automatically

Select temperature units (oC or oF)

Turn the meter OFF first. Press and hold down both buttons until the display turns on and begins

blinking then release the buttons

Press both buttons momentarily to change temperature units

After 5 seconds the meter switches back to normal operation mode automatically

Taking Measurements

Position the meter so that the airflow enters the meter vane from the rear of the meter (opposite side of

front panel logo). A tripod mount is located on the bottom of the meter.

Max Hold

Max Hold represents the highest measurement taken since the meter was turned on Press the

UNITS/MODE button to display the Max reading (MAX icon appears)

Press the UNITS/MODE button repeatedly to step through to the normal operating mode

Average mode

5 or 10 reading averages can be displayed in the Average Mode.

Press UNITS/MODE 3 times for 5 reading averaging or 4 times for 10 readings

To exit this mode, press the UNITS/MODE button until the icons on the left disappear

Data Hold

Data Hold freezes the most recent displayed reading

Press and hold the ON/OFF/HOLD button to activate Data Hold

As long as the ON/OFF/HOLD button is held the reading will remain on the LCD

Specifications

Measurement

Range

Resolution

Accuracy (% of reading)

MPH (Miles per hour)

2.5 to 44.7 MPH

0.2 MPH

± (3% + 0.4 mph)

km/hr (kilometers per

4.0 to 72.0 km/h

0.7 km/h

± (3% + 1.4 km/hr)

hour)

Knots (nautical miles

2.1 to 38.9 knots

0.3 knots

± (3% + 0.6 knots)

per hour)

m/sec (meters per

1.1 to 20.0 m/s

0.1 m/s

± (3% + 0.2 m/s)

second)

ft/min (feet per

216 to 3936 ft/min

20ft/min

± (3% + 40 ft/min)

minute)

Beaufort force

1 to 8 BF

1 BF

± 1

Temperature

0 to 122

F (-18 to 50

0.1

F/C

± 1.8

F (± 1

Relative Humidity

10 to 95%

±5%RH

Dew Point

32 to 122 oF (0 to 50oC)

0.1

F/C

± 3.6

F (2

General Specifications

Display

Dual LCD with low battery and multifunction indicators

Sensors

Sapphire bearing, non-corrosive vane for air velocity;

Precision thermistor for temperature measurements

Average Mode

Choice of 5 or 10 reading averaging (2 second factory

default)

Max and Data Hold

Max recalls the highest reading; Data Hold freezes the

Displays

display

Sample time

1 reading per second for air velocity and temperature

(1 reading per 15 seconds for humidity with 2 second

updates)

Water-resistant

To 3’(1m)

Operating conditions

5 to 122oF (-15 to 50oC) / < 80% RH

Power supply

Lithium battery (CR-2032 or equivalent) / 400 hour battery

life

Dimensions / Weight

Instrument: 133 x 70 x 19mm( 5.25 x 2.75 x 0.75”)

Vane: 1’(24mm) diameter /3 oz.(95 g)

Maintenance

Battery Replacement

The AM250 has a low battery indicator (battery symbol). Important: Turn the meter off before

opening the battery compartment. Using a coin, turn the battery compartment cover CLOCKWISE

to remove it. Once opened, observe the position of the battery, placing the new one in the same

position. Secure the battery compartment cover and dispose of the lithium battery in accordance

with local, state, or national disposal codes.

All EU users are legally bound by the Battery Ordinance to return all used

batteries to community collection points or wherever batteries / accumulators

are sold.

Disposal in household trash or refuse is prohibited.

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at

the end of its lifecycle

Other Battery Safety Reminders

Never dispose of batteries in a fire. Batteries may explode or leak.

Never mix battery types. Always install new batteries of the same type.

Impeller Replacement

Remove the set screw next to the impeller assembly (on the rear of the meter). Twist the impeller

assembly counter-clockwise to the OPEN position and remove

it.

Install impeller by inserting & twisting the new impeller assembly clockwise Tighten

the set screw.

CFM Measurements

Measure the area of the duct using the diagrams below for rectangular and circular ducts (If the

duct measurements are made in inches, divide the inches by 144 to get the area in square feet).

Plug the area value (in square feet) in the cubic equations below. Note that the air velocity must be

plugged into the cubic equations also.

CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2)

CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60

Warranty

Triplett / Jewell Instruments extends the following warranty to the original purchaser of

these goods for use. Triplett warrants to the original purchaser for use that the products

sold by it will be free from defects in workmanship and material for a period of (1) one

year from the date of purchase. This warranty does not apply to any of our products

which have been repaired or altered by unauthorized persons in any way or purchased

from unauthorized distributors so as, in our sole judgment, to injure their stability or

reliability, or which have been subject to misuse, abuse, misapplication, negligence,

accident or which have had the serial numbers altered, defaced, or removed.

Accessories, including batteries are not covered by this warranty

Test Equipment Depot -800.517.8431 -5 Commonwealth Ave, Woburn, MA 01801

TestEquipmentDepot.com

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